Hybrid Time-Frequency Domain Turbo Equalization for Single Carrier MIMO Underwater Acoustic Communication

被引：0

作者：

Dang, Qianqian ^{[1
,2
]}

Wang, Han ^{[1
,2
]}

Jing, Lianyou ^{[3
]}

Zhang, Yang ^{[1
,2
]}

He, Chengbing ^{[1
,2
]}

机构：

[1] Northwestern Polytech Univ, Sch Marine Sci & Technol, Xian, Peoples R China

[2] Northwestern Polytech Univ Shenzhen, Res & Dev Inst, Shenzhen, Peoples R China

[3] Dalian Univ Technol, Sch Informat & Commun Engn, Dalian, Peoples R China

来源：

CONFERENCE PROCEEDINGS OF 2019 IEEE INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING, COMMUNICATIONS AND COMPUTING (IEEE ICSPCC 2019) | 2019年

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

MIMO; Underwater acoustic communication; single carrier; hybrid time-frequency domain Turbo equalization;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Shallow seawater acoustic channel has serious multipath effect. We proposed hybrid time-frequency domain Turbo equalization (HTFDTE) and bidirectional time-frequency domain Turbo equalization (Bi-HTFDTE) for multiple-input multiple-output (MIMO) single carrier (SC) underwater acoustic system with PN code to improve the quality of underwater acoustic communication. At the receiving end, the channel is estimated using the known PN code. The frequency domain equalization with minimum mean square error (MMSE) criterion and the time domain Turbo iterative processing are combined together to further improve performance. To eliminate error propagation effect, the Bi-HTFDTE includes two parallel HTFDTE structures, which requires roughly twice as many computational operations per iteration as the HTFDTE but achieving a lower bit error rate (BER). From the simulation results, we can find that the BER performance of HTFDTE is better than frequency domain Turbo equalization (FDTE). At the order of 10(-4), the HTFDTE with three iterations gains about 0.5dB and 1dB over the HTFDTE with first iteration and the FDTE with first iteration for QPSK modulation, respectively. The Bi-HTFDTE with three iterations gains about 0.15dB over the HTFDTE with three iterations.

引用

页数：6